Patent US2969754A successfully refreshed from Google Patents.
US2969754A
Expired / Lapsed
US
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Roof structure
Assignee: Acme Steel Co
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Filing: 1955-05-13
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Granted: 1961-01-31
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Expires: 1975-05-13
Abstract
No abstract record available.
Inventors
- 👤 Allen B Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 05:44
CPC Classifications
E; E04; E04D; E04D3/00; E04D3/36; E04D3/366; E04D15/00; E04D15/04; Y; Y10; Y10S; Y10S52/00; Y10S52/01; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49908; Y10T29/49915; Y10T29/49922
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1778337A
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US1949543A
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US1997939A
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US1865674A
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US1843062A
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US2211384A
Cited
US2673390A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-31 | 1964-08-01 | 1965-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-31 | 1968-08-01 | 1969-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-31 | 1972-08-01 | 1973-01-31 | $7700.00 | Window Closed / Lapsed |